Wire looked good so did not replace. All PVC female couplings replaced with cast.

Took about 45 minutes to pull the pump and 1.5 hours to replace PVC couplings and install new pump.

The pump installers asked if I knew about the CSV1Z, "yes, I installed myself". They agreed with me that pumps were meant to be run and start/stop cycles were the big pump killer but their position was there should be nothing between pump and pressure switch and that the CSV could reduce pump cooling.

Installers also said they're seeing more and more CSVs in the area (Colorado), had installed many at the commercial level but would rather sell VFDs for residential usage.

Long short my well pump failed after 15 years which seems about average. Not cheap.